Railway truck structure



July 25, 1944.

-c.k F. FREDE RAILWAY- TRC'K STRUCTURE Filed Jan. 18, 1940 5 Sheets-Sheet 1 July 25, 1944 c.F. FRL-:DE l 2,354,309

RAILWAY TRUCK STRUCTURE Filed Jan. 18, 1940 5 Sheets-Sheet 2 6 -INVENTQR FEA- ,CHARLES F. FRED:

' .7 ATTORNEY I.

July 25, 1944. c; F. FRI-:DE

RAILWAY TRUCK STRUCTURE Filed Jan. 18, 1940 5 Sheets-Sheet 3 ynvr/Elvo C HA Rurs F. FRED;

July 25,1944 c. F. FREDE RAILWAY TRUCK STRUCTURE 5 Sheet-Sheat -4 l Filed Jan. 18,*1940 INVENTOR CHARLES E FRED:

7 ATTORNEY l vibrations transmitted through 'mesas .mi 25.1944

RAILWAY TRUCK STRUCTURE cm1 aprecie,- (leneral Steel University City, Mo., assigner Corporation, ranite City. Ill., a corporation of Delaware L Application January 18,

The invention relates to railway rolling stock and more particularly to truck structure including equalizers between the axle journal boxes and brake gear mounted thereon,

- Trucks used -in railway passenger and highspeed freight service usually are of heavy construction. and the conventionall braking mechanisms are also heavy and tend, when the brakes are applied, to

the frame to the car body. Conventional mechanical brake gear suspended from the truck frame tends to apply undesirable vertical forces to the truck springs and to the wheels.

The main object of the present invention is to provide a. ilexible, light-weight truck adapted for passenger and high-speed freight service and utilizing relatively light-weight braking structure.

Another object is to limit the reactions resulting from. the applications of the brakes to circunlierential reactions about the journals and to avoid the transfer of undesirablel forces into the truck frame, and to avoid the eiect of increasing the vertical loading on the wheels.

Another object. is to' have the brake-heads, and shoes, and preferably associated parts, move vertically with the wheels, relative to the frame, and independently of movements of the truck frame -and bolster relative to the wheels.

A more detailed obiect is to mount the brake power operating means on equalizers. Another object is to provide an, individual brake gear for each wheel, and thereby eliminate a number of parts which would be used frequently, such as brake beams, pull rods, unnecessarily heavy levers, etc., which transfer brake force yfrom one end ofthe truck to the other.

Another object is to lighten the truck by combining the equalizers and journal boxes, elimithe journal boxes or tilt the truck frame and to produce c 194e, serial No. 314.368. 1s (ci iss-Ass)- L the operation of all the of air supply.

Figure 6 is a top diagrammatic view illustrating another arrangement of individual br'ake gears actuated by a single master cylinder mounted on the truck frame.

Figure 'I is a vertical section taken ion a linev f 1-1 of Figure 8.

Figure 8 is e top view of one quarter of a truck embodying another form ofthe invention. Figure 9 is a side'elevation oi the structure shown in Figure B.

wheels 2,

Figures i0, 11 and 12 are vertical transverse sections taken on corresponding section lines of The truck illustrated in Figures 1 to 4 includes axles I, and depressed equalizers 8 extending between and carried'on the axle journals by integrally formed boxes 8 equipped with roller bearing units 0. Coil izers l, support the side members vl2 of a truck frame which includes transverse transoms M preferably formed integral with side members i2 and depressed between the side members to clear the vehicle body underframe (not shown). Sus-f pended from the end portions of transoms -II are swing hangers i6. oi hangers being connected by a cross-bar i8 and a spring plank 2 6 extending between and being supported -by the truck. Elliptic springs 22 are seated upon spring plank 20 and mount the truck bolster 23 which comprises a central portion, having a center plate-'21, and end portions 20 resting. on

' 30 each having an individual hydraulic expanding brake power unit, that thrusts the brake shoes nating the journal box pedestals on vthe frame v andshortening the frame side members.

These and other detail objects as will appear hereafter are attained in the structures illustrated in the accompanying drawings in which- 8.v Each bracket 38 is 'nested in equalizer lsprings :tand provided with brackets 2l forming or carrying the truck side bearings.

Eachjournal box 8 includes a pair of chambers Il against the' drum It rigidl with the wheel. Lugs 31 on each journal box B interengage brake shoes u to position and `guide the shoes towards and away from the brake drum and to prevent the shoes from rotating with the drum.

Each equalizer standing brackets 38 spaced from journal boxes provided' with a. channel shaped liner or wear plate l0. Eachir'ame side member I2 vis: pro'- depending arms receiving vided with a pair of the upper end of springs Il and having terminals wear plates M opposing the equalizer bracket wear plates 4l. This arrangement positions the VIl truer frame longitudinally and transversely or individual brake gears on a truck by a single source springs iii, seated on equal- The lower ends of each pair cross-bars I8 at opposite sides of 0 is provided with a pair o f upa channel section and is'` brackets 38 andprovided with swing hangers IB through conduit through hydraulic iluid which omits the v v cylinder or below the same beyond the the equalizers but accommodates relative vertical movement of the truck i'rame and equalizers due to the action of springs il.

The bolster moves laterally and verticallyof the frame and equalizers dueto the action of the and elliptic springs 22. The lateral movement oi' the bolsteris limited by the contact of its" ends with the frame side members and movement of the bolster longitudinally of the frame is' limited by the contact of -chafing plates Il on the bolster with chafing plates l1 yon transoms I4.

Preferably all of the individual brake gear arrangements on the truck are operated by a single master cylinder 50 mounted on one of the equalizers 6 and having conduits Il, I2, Il and I4 Jaws Il on equalizers Il and the latter are slotted transversely to` receive brake beam Il the outer ends of which are connected by clevises Il to the leading to the individual brake gear. Conduits` v and 52 may be of rigid construction and iixedly secured to equalizer t which mounts the master cylinder. Cross-conduit 53 may be amxed to the frame transom with its ends connected to conduits I2 by flexible tubes Il.

Master cylinder lll receives compressed air 52-53 from a reservoir (not l to units struction oi' the master cylinder dividual brake operating power units 3,2 forms the subject matter of a separate application. Berial No. 314,432 iiled January 18, 1940, by the present applicant and Emil J. Schleicher and now Patent #2,319,950, May 25, 1,943. l

Figure 5 illustrates a form of the invention master pneumatic-hydraulic cylinder common to all of the individual brake gears on the truck as described above. vidual brake operating power unit Il comprises a quick-acting combined pneumatic and hydraulic cylinder and piston structure also disclosed in the above mentioned Frede and Schleicher application. All of these units Iii will be connected by' conduits il, tubes 02 and conduits I8 to a supply line Il leading from an air reservoir (not shown), preferably mounted on the vehicle underframe.

Figures 6 and 7 illustrate .a form of the invention in which a master cylinder 1l, similar to l0 in Figures i4, is mounted on a truck frame transom .member 1I and receives com- Dressed air through an inlet 'Il and. with its piston-and associated parts, forces hydraulic braking fluid through outlets 'It andN to conduits 'Il and 1I, carried on the truck equaliser 'I1 like the 32. 'I'he con lil and the inconduite previously described. Flexible tubes Il connect the cylinder outlets `"and 'I4 tothe side conduits 'IlA and 1l. l v

In the forms of the invention illustrated in Figures 1 to 7 the transverse conduits or tubing lyshowninI'igure'Lormsybecan-iedabove as may be expedient. Y Figures 8 to 12 illustrate' another form ot the invention in which a double acting cylinder and piston assembly II (operated preferably bycompressed air only) is carried by a bracket exf tending upwardlyv from each Journal box Il. A

extends from each Journal box toci. the truck and terminates in II. Brake heads I4 are slotted bracket Il wards the end brake hanger Jaws transversely at Il beams 3l. which extend transversely of the truck brake heads vinto the same general vertical planeas cylinders Il.

Brake levers n ere pxveted te Jews u on u direeuybyms the equalisers es moet clear-- to receive the ends ot brake uitbrak tegrally with Vthe ilar1y. Jaws 3| and |02 may on the same side of the f ing epertured transversely of the truck, brake through said apertures. and power means mounted on said Journal boxes and ated by Piston rod lol.

The brake cylinder is shown as being castI inbut it will be understood be formed separately and bolted together. Bimbe formed integrally with bracket Il and equalizer Il instead of comprising separate parts bolted to the bracket and equalizer.

In all forms of the invention the provision of the equalizers and Journal boxes as umts and the mounting of the truck frames with relatively short side members terminating at points v spaced from the Journal boxes lightens the truck structure and mords room for the brake structures. whether of the expanding shoe construction. All or of the` vibrations due lto c brake parts a substantial part atter between the and wheels arenbsorbed before beset forth in the introductory portion oi' the specification', but '"the structures may be varied substantially by those skilled in the art without departing from the spirit of the invention and the exclusive use of such modincations as come within thescope of Whatisclaimedis:

l. In a railway truck. axles. wheels. Journal boxes thereon, equalizers on said Journal boxes, e cylinders and pistons carried by said Jolunal boxes. brake levers fulcrumed on said equalizers, and brake elements carried by said levers and applied to said wheels by said cylinders and pistons.

2. In a railway truck, axles, wheels and Journal boxes thereon,` equaiisers extending between Journal boxes on the same side of the truck, brake beams carried by said equalizersIl and power means carried by said Journal boxes and operatively connected to said beams.

3. In a railway truck, axles having Journals.

wheels, structure including Journal boxes and' member extending betweeniournals truck, said structure bebeamsextending operatively connected to said brake beams.

, '4. In a railway truck, axles. wheels and Journal boxes thereon. equalizers between said Journal frame, spring supported on laid pivotally suspended from said elements carried by said links. and piston unite rigid with seid equaliser-s and operatively connected to said brake elements.`

are' e reuwey truck, sheen. axles thereon. f

0n said axles, members carried iournal boxes Journal boxes and'moveble vertiequalizer and the' Journal box,`

that these parts may 4 the claims is contemplated.v

brake elements movable with said l 6. In a railway truck, spaced axles, wheels' thereon, rigid journal box and equalizer structure carried on and extending between and beyond axles at the same side of the truck, brake gear for each wheel including elements having a. stationary mounting on the corresponding structure at opposite sides of-the axle and also including individual power means having a stationary mounting on the structure.

'7. In a railway truck, axles having journals, wheels, structure including journals on the same side of the truck, atruck frame, springs supported on said structure interannular drum comprising a journal boxes and an equalizer member extending between and beyond posed between said structure and frame, brake g gear mounted on said structure independently of said truck frame and including elements carried by said structure at opposite sides of said journals and also including air cylinder and piston units operatively connected to said elements.

8. In Aa railway truck, spaced axles, Wheels thereon, journal box and equalizer structures carried on and extending between adjacent axles -outwardly of the wheels, a load-carrying frame yieldingly supported on said structures, and brake gearfor each wheel comprising spaced pressure elements at opposite sides of the corresponding vaxle and applicable to the wheel, and power mechanism between said elements for thrusting them in opposite directions transversely of the f axle, said elements and mechanism being mounted on the associated journal box and equalizer-structures independently of said frame, and being ac-V cessible while said structure, wheels and frame are assembled.

9. AV construction as described in claim 8 in which the power mechanism comprises cylinder and piston means operatively associated with thev pressure elements and operable to apply the pressite sides of the axle for engagement .anisms carried sure elements to the wheel independently of relative movement of the frame and equalizer.

10. A construction as described in claim 8 in which there isan annular drum on the side of the wheel and surrounding and cooperating with the brake gear pressure elements.

11. In a railway truck, an axle including a journal, awheel mounted on ceiving element, brake friction members at oppoelement, and a power meansvbetween said members for thrusting the same in opposite directions transversely of the axle 'and against said element, a load carrying frame, and an equalizer supporting the same from the wheel and axle but clearing said drum and friction members and mounting said power means 12. In a railway truck, axles having journals, wheels, rigid structure including spacedv journal boxes and an equalizer member extending between them, a brake gear for each wheel carried by said structure and including iluid cylinder units at opposite sides of the axle and rigid with the structure, `pistons therein, and brake shoes at opposite sides of the axle both movable transversely of the axle by both of said pistons and applicable to the associated wheel, said lbrake gear being accessible from the side o the truck while the wheels and said structure are assembled.

13. In a railway'truck, spaced axles with wheels,

and equalizers extending boxes at the saine side of the truck, a load carrying frame yieldingly supported upon the equalizers, the equalizers merging .with the journal boxes and the frame terminating at points spaced from the journal boxes so that the major portion of theouter face of .eachawheel is unobstructed by the equalizer and frame,

by the equalizer and journal box elements applicastructure and` including friction the unobstructed ble to cooperating elements on portions of the wheels.

l CHARLES F. FREDE.

said axle and having an brake pressure rewith said 

